A 1.8 g sample of oleic acid (C18H34O2), a common constituent of fats, is burned in a bomb calorimeter. The temperature of the calorimeter increases by 35.8oC (Celsius). Given that the energy of combustion (∆E) for oleic is -39.4 kJ/g, calculate the heat capacity of the bomb calorimeter. Make sure you enter kJ/C for your unit behind the number.
heat capacity of the calorimeter =

Answer:

B is the answer

Please give brainliest

Explanation:

I play Minecraft and Dream made it once

Answer:

What is surface tension?...Surface tension is the surface of film of any kind of liquid caused by attraction of the particles in its surface layer. This bulk of liquid is something that tends to minimize surface areas.

Answer:

• All groups (columns) have the same number of valence electrons

Explanation:

Every group or column have the same number of valence electrons as a suprise. Every column is aligned in this way.

Answer:

all members within any group

Explanation:

Answer:

yes

Explanation:

Lewis electron dot notation is a method for representing the valence electrons in an atom. In this notation, the valence electrons are shown as dots around the symbol of the element. The number of dots represents the number of valence electrons.

The Lewis electron dot notation is a useful tool for understanding the chemical behavior of elements. It allows us to see how many valence electrons an atom has and how they are distributed. This information can be used to predict the types of chemical bonds that an atom is likely to form. For example, the Lewis electron dot notation for nitrogen is:
N: ·
Nitrogen has five valence electrons, so there are five dots around the symbol.
In addition to representing individual atoms, the Lewis electron dot notation can also be used to represent molecules. In a molecule, the dots represent the shared electrons between the atoms.  The Lewis electron dot notation is an important concept in chemistry that helps us to understand the properties and behavior of atoms and molecules.

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Contributing to the body of knowledge.

When you decide whether or not the data supports the original hypothesis, you are "contributing to the body of knowledge." Explanation:Scientific investigation is a way of answering questions about the natural world. An inquiry or investigation can be initiated by a researcher or a group of researchers who have questions regarding a certain phenomenon. The inquiry or investigation is usually done by conducting an experiment or making an observation and then collecting data. After collecting the data, the researchers analyze it to check if it supports their hypothesis or not.The body of knowledge refers to the totality of data that has been collected and analyzed. It comprises all the data that researchers have acquired over time through scientific investigations. When researchers decide whether or not the data supports their original hypothesis, they contribute to this body of knowledge. The new data may either confirm the hypothesis or lead to a revision or rejection of it, adding to the body of knowledge.

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Answer:

41826.05 Calories

Explanation:

1 J = 0.239006 Calories

175 KJ

= 175 x 1000 J

= 175000 J

175000 J to Calories

= 175000 x 0.239006

= 41826.05 Calories

Answer: 41.8

Explanation:

Acellus verified ✅

Answer:

A = 0.7871g

B = 0.8417g

C = 0.3192g

D = 0.3897g

Explanation:

Hello,

The number of grams of sodium (Na) in 2g of NaCl is

Molar mass of NaCl = 58.44g/mol

Molar mass of Na = 23g

23g of Na = 58.44g of NaCl

x g of Na = 2g of NaCl

x = (2 × 23) / 58.44

x = 0.7871g

Therefore, 0.7871g of Na is present in 2g of NaCl

2.

2g of Na₃PO₄

Molar mass of Na₃PO₄ = 163.94g/mol

Molar mass of Na = 23g

(3 × 23)g of Na = 163.94 g of Na₃PO₄

x g of Na = 2g of Na₃PO₄

x = (2 × 69) / 163.94

x = 0.8417g

0.8417g of Na is present in 2g of Na₃PO₄

3.

2g of NaC₇H₅O₂

Molar mass of NaC₇H₅O₂ = 144.103g/mol

Molar mass of Na = 23g

23g of Na = 144.103g of NaC₇H₅O₂

x g of Na = 2g of NaC₇H₅O₂

x = (2 × 23) / 144.103

x = 0.3192g

0.3192g of Na is present in 2g of NaC₇H₅O₂

4. 2g of Na₂C₆H₆O₇

Molar mass of Na₂C₆H₆O₇ = 236.08g/mol

Molar mass of Na = 23g

(2 × 23)g of Na = 236.08g of Na₂C₆H₆O₇

x g = 2g of Na₂C₆H₆O₇

x = (46 × 2) / 236.08

x = 0.3897g

0.3897g is present in 2g of Na₂C₆H₆O₇

Answer:

4 millllllermeeters jb

The balanced reaction of the neutralization of malonic acid (C3H4O4) with potassium hydroxide (KOH) will be:

That is to say, to neutralize a mol of Malonic acid (C3H4O4) two moles of KOH are needed.

Now, we must determine the moles present in the KOH solution, they give us the molarity of the solution. Molarity represents the moles of solute in one liter of solution. So, the moles of KOH will be:

We will now find the moles of the acid present using the stoichiometry of the reaction. Two moles of KOH neutralize one mole of malonic acid.

That means that in that 25 mL of malonic acid solution there was 0.006 mol of malonic acid.

Now we are going to calculate the molar concentration (molarity) of the initial solution of malonic acid before being neutralized. We have a volume of the solution of 25 mL, therefore the molarity will be:

So, the molar concentration of the malonic acid solution will be 0.24M

All of the lipid compounds are soluble in organic solvents but not in water. Among the given examples, the lipids are oils, cholesterol and phospholipids. The correct options are A, B and D.

The organic compounds which consists of carbon, hydrogen and oxygen atoms and they form the framework for the structure and function of living organisms are called lipids.

These compounds are non-polar molecules which are soluble only in non-polar solvents and it is insoluble in water. They are composed of fats and oils. They are energy rich molecules which provide energy to perform different processes.

Thus the correct options are A, B and D.

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The structure for 2-methyl-3-propalhex-2-yne can be shown in the image attached.

We know that a compound is composed of atoms that can be found in the compound. For the organic compound, we can see that we can be able to obtain the structure of the compound from the structure.

The compound as we can see is  2-methyl-3-propalhex-2-yne. The structure of the compound must be able to include a double bond as we can clearly see from the image that is attached to this answer.

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Answer:

Animals obtain energy from the food they consume , using that energy to maintain body temperature and perform other metabolic functions. Glucose, found in the food animals eat ,is broken down during the process of cellular respiration into energy source called ATP.

Answer:

i.

A kid falling out of a tree - Gravitational Potential energy to Kinetic energy

ii.

A scout rubbing sticks together to start a fire - Kinetic energy to Heat energy

iii.

A man running a kerosene heater - Chemical Potential energy to Heat energy

Answer:

B. When one element replaces another element in a compound during a chemical reaction

Answer:

Hg

Explanation:

Hg is a correct chemical symbol of an element. Therefore, The correct option is option C among all the given options.

The quantity of protons an element has defines it. An element's atoms all contain the same amount of protons, but its electron and neutron counts might vary. Ions are produced by altering the electron to proton ratio, whereas isotopes are produced by altering the neutron count.

A material that cannot be destroyed chemically is referred to as a chemical element. Although chemical processes cannot modify an atom, nuclear reactions can create new elements. Hg is a correct chemical symbol of an element. A material that is not further decomposed either by chemical reaction is known as a chemical element.

Therefore, Hg is a correct chemical symbol of an element. The correct option is option C among all the given options.

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The statement which correctly describes the energy of the particles of the substance for point D to E is that Potential energy increases and average kinetic energy remains the same which is therefore denoted as option 3.

This is referred to as the energy possessed by a body by virtue of its motion while potential energy is the energy possessed by a body by virtue if its position.

The graph shown depicts that temperature is constant from point D to E which means that the particles are at a position which depicts potential energy.

Temperature is referred to as the average kinetic energy of molecules which ius therefore the reason why a constant temperature also means that  the average kinetic energy remains the same which is therefore the reason why it was chosen as the correct choice.

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Answer:

Observation

Explanation:

Observation is the first step in scientific method. First of all you observe anything or any activity.

Then you think about how it is going this way. If it happens so and so what will happen... then perform experiments. Etc

Observation

Hypothesis

Theory

Experiments

Law

The partial pressure of F2 and a mixture of gases where the total pressure is one atm. The mole fraction of F2 is 0.394736.

The term mole fraction is defined as the number of molecules of a component in a mixture is divided by the total number of moles in the given mixture.

Total pressure = 1 atm

= 760 torr

Then,

The partial pressure of F2 = 300 torr

The mol fraction of F2 = PF2/PT

= 300/760

= 0.394736

Thus, The partial pressure of F2 and a mixture of gases where the total pressure is one atm. The mole fraction of F2 is 0.394736.

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Based on the conversion factor, the number of ounces of paper an average college student uses per day is  14 ounces of paper per day

A conversion factor is a value that is used to make the conversion from one unit of measurement to another.

The conversion factor from pounds to ounces is given below as follows:

1 pound = 16 ounces

Also, the conversion factor from years to days is given below as follows:

1 year = 365 days

Hence, the ounces of paper an average college student uses per day are calculated as follows;

320 pounds = 320 * 16 ounces

320 pounds = 5120 ounces

Ounces of paper per day = 5120 / 365

Ounces of paper per day = 14 ounces per day

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The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

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another name for a maggot is a worm

a)  the ion with 5 d electrons complexed by a strong ligand, with a coordination number of 6, is likely to have a low spin configuration with zero unpaired electrons.

b) The central atom would be diamagnetic.

a. The energy level diagram for the five d orbitals with their electrons can be represented as follows:

↑

↑

↑

───dxy───

↑

dxz dyz

↑

───dz²───

↑

↑

↑

This diagram shows the five d orbitals (dxy, dxz, dyz, dz², dx²-y²) and their electrons. Since the central ion or atom has 5 d electrons, each orbital will have one electron occupying it.

b. Based on the information provided, we can determine the properties of the ion:

High spin or low spin: The ion is likely to be low spin. This is because it has a strong ligand complexing it, which leads to a large crystal field splitting energy. In low spin complexes, the electrons tend to pair up in the lower energy orbitals before filling the higher energy orbitals. Therefore, the electrons would pair up in the d orbitals, resulting in a low spin configuration.

Number of unpaired electrons: In a low spin configuration, the electrons pair up in the d orbitals. Since there are 5 d electrons in the complex, all of them would pair up, resulting in zero unpaired electrons.

Diamagnetic or paramagnetic: Diamagnetic compounds have all their electrons paired up, resulting in no net magnetic moment. In this case, with all the d electrons paired up, the central atom would be diamagnetic.

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The energy used to heat the iron from 25°C to 75°C will be 88J

Given,

m= 4 g

c, i.e, specific heat of Iron is 0.44 J°C⁻¹g⁻¹

The heat energy is given by  formula,

q=mcΔT

where q is the amount of heat and m is the substance's mass.

T represents the temperature change, and c is the material's specific heat capacity. The addition of heat affects various substances in varying degrees. Different materials' temperatures rise by different amounts when a given amount of heat is applied to them.

q =4× 0.44× ΔT

ΔT= T₂₋ T₁

ΔT= 75- 25

= 50°C

q= 4×0.44×50

=88 J

So, the energy used to heat the iron will be 88J.

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Answer:

0.550 M HCl

Explanation:

M1V1 = M2V2

M1 = 0.455 M NaOH

V1 = 14.50 mL NaOH

M2 = ?

V2 = 12.0 mL HCl

Solve for M2 --> M2 = M1V1/V2

M2 = (0.455 M)(14.50 mL) / (12.0 mL) = 0.550 M HCl

Answer:

The appropriate answer is "0.549 M".

Explanation:

The given values are:

N₁ = 14.50 mL

V₁ = 0.455 M

N₂ = 12 mL

Let

V₂ = C = ?

As we know,

⇒  \(N_1\times V_1=N_2\times V_2\)

On substituting the values, we get

⇒  \(14.50\times 0.455 = 12\times C\)

⇒            \(6.5975=12\times C\)

⇒                   \(C=\frac{6.5975}{12}\)

⇒                       \(=0.549 \ M\)

The true statement concerning the motifs and domains of proteins is Separate proteins with similar domains are likely to have a similar function. The correct answe is C.

 The biological activity of a protein can occasionally be anticipated by looking for existing proteins with comparable amino acid sequences since proteins with similar structures typically have similar activities.

Finding motifs and domains is a crucial part of biological sequence characterisation. Because freshly acquired protein sequences frequently lack significant similarity with database sequences of known functions over their entire length, making functional assignment challenging, it is crucial to identify unknown protein activities.

In this instance, the identification of brief consensus sequences linked to known functions can help researchers understand how the protein acts. The name "motifs" refers to these consensus sequence patterns.

Your question is incomplete but most probably your full question was

Which of the following is true concerning the motifs and domains of proteins?

Many domains make up a motif.

Every polypeptide chain is limited to one domain.

Separate proteins with similar domains are likely to have a similar function.

All domains of a protein have the same function.

None of the above are true

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Answer:

C

Explanation:

sorry if im wrong!!